<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <select  id="aihao">
        <option value="0" label="看电影"></option>
        <option value="1" label="睡觉"></option>
        <option value="2" label="洗脚"></option>
    </select>
    <script>
        var aihao = document.querySelector('#aihao')
        aihao.onchange = function(){
            console.log(this.value)
        }
    </script>
</body>
</html>